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Leona [35]
3 years ago
13

Another gas was used for many years to float transportation balloons.

Chemistry
1 answer:
Alja [10]3 years ago
6 0
Another gas that was used to fill balloons was hydrogen. The reason why hydrogen is not used today is because it use to cause many fires when it was used to fill balloons up.

Hope I helped you! :)
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g If you have three identical containers (same volume) at the same temperature and pressure, each with a different gas. Containe
vekshin1

Answer:

<em>The three gases, in the three identical containers, will all have the same number of molecules</em>

Explanation:

If these three gases (Helium He, Neon Ne, and Oxygen O_{2}) are all contained in separate identical containers with the same volume. And they are all stored at the same temperature, and pressure. Then, they'll all contain the same number of molecules. This is in line with Avogadro's law which states that "Equal volume of all gases, at the same temperature and pressure, have the same number of molecules."

6 0
3 years ago
What do chemists use percent yield calculations for in the real world?
STALIN [3.7K]

Answer:

C. To determine how efficient reactions are.

D. To determine how much reactant they need.

Explanation:

When you are doing a reaction, you are hoping for a percent yield to close of 100%. You make the reaction and determine how many product you obtain. If you know the percent yield of a reaction you can calculate the amount of reactant you need to obtain a determined amount of product.

Having this in mind:

A. To balance the reaction equation.  false. To calculate percent yield you need to balance the reaction before. You don't use percent yield to balance the reaction

B. To determine how much product they will need.  false. You determine how much product you obtain after the reaction. How much product you need is independent of percent yield

C. To determine how efficient reactions are.  true. A way to determine efficience of a reaction is with percent yield. An efficient reaction has a high percent yield.

D. To determine how much reactant they need. true. If you know percent yield of a reaction you can know how many reactant you must add to obtain  the amount of product you want.

8 0
2 years ago
1. Explain how and why stars appear to move through the sky throughout the night. Then, explain why Polaris does not move.
Bas_tet [7]
Polaris the north star is very bright and it doesn’t move
3 0
3 years ago
In humans, the allele for curly hair and the allele for straight hair show incomplete dominance the offspring of a curly haired
Vika [28.1K]
A
eplanation
i meannn they both had curly hair
3 0
3 years ago
Read 2 more answers
If Salt is NaCl, what atoms does the compound contain?
allochka39001 [22]
Na is the elemental abbreviation for sodium, and Cl is the abbreviation for chlorine.
When the two are combined, you get sodium-chloride, or table salt.
Hope that helped =)
8 0
3 years ago
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